import 'package:enjoy_plus_hm/utils/http.dart';
import 'package:enjoy_plus_hm/utils/toast.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';
import 'package:permission_handler/permission_handler.dart';

class LocationList extends StatefulWidget {
  const LocationList({super.key});

  @override
  State<LocationList> createState() => _LocationListState();
}

class _LocationListState extends State<LocationList> {
  @override
  void initState() {
    super.initState();
    requestLocationPermission();
  }

  /// 请求位置权限
  Future<void> requestLocationPermission() async {
    PermissionStatus status = await Permission.location.request();
    if (status.isGranted) {
      ToastUtil.showSuccess('权限已授予');
      getCurrentLocation();
    } else {
      // 权限未授予
      ToastUtil.showError('位置权限未授予, 请去设置中心开启');
    }
  }

  /// 异步获取当前设备的位置信息。
  /// 此方法首先根据设备的平台（Android、iOS/macOS 或 Web）配置不同的定位设置，
  /// 然后使用这些设置获取设备的当前位置，并处理位置信息或异常。
  Future<void> getCurrentLocation() async {
    late LocationSettings locationSettings;

    if (defaultTargetPlatform == TargetPlatform.android) {
      // 针对Android平台，设置高精度定位、100米距离过滤、强制使用位置管理器等
      locationSettings = AndroidSettings(
        accuracy: LocationAccuracy.high,
        distanceFilter: 100,
        forceLocationManager: true,
        intervalDuration: const Duration(seconds: 10),
        foregroundNotificationConfig: const ForegroundNotificationConfig(
          notificationText:
              "Example app will continue to receive your location even when you aren't using it",
          notificationTitle: "Running in Background",
          enableWakeLock: true,
        ),
      );
    } else if (defaultTargetPlatform == TargetPlatform.iOS ||
        defaultTargetPlatform == TargetPlatform.macOS) {
      // 针对iOS和macOS平台，设置高精度定位、健身活动类型、100米距离过滤等
      locationSettings = AppleSettings(
        accuracy: LocationAccuracy.high,
        activityType: ActivityType.fitness,
        distanceFilter: 100,
        pauseLocationUpdatesAutomatically: true,
        // 只有在应用在后台启动时才设置为true
        showBackgroundLocationIndicator: false,
      );
    } else if (kIsWeb) {
      // 针对Web环境，设置高精度定位、100米距离过滤、5分钟的最大年龄等
      locationSettings = WebSettings(
        accuracy: LocationAccuracy.high,
        distanceFilter: 100,
        maximumAge: const Duration(minutes: 5),
      );
    } else {
      // 对于其他平台，默认设置高精度定位和100米距离过滤
      locationSettings = const LocationSettings(
        accuracy: LocationAccuracy.high,
        distanceFilter: 100,
      );
    }

    try {
      // 使用配置好的定位设置获取当前位置
      Position position = await Geolocator.getCurrentPosition(
        locationSettings: locationSettings,
      );
      ToastUtil.showSuccess('经:${position.longitude}, 纬:${position.latitude}');
      reverseGeocoding(position.longitude, position.latitude);
      searchPlaceAround(position.longitude, position.latitude);
    } catch (e) {
      ToastUtil.showError('获取位置信息失败');
      print(e.toString());
    }
  }

  /// 逆地理编码地址结果
  String address = '';

  /// 逆地理编码
  Future<void> reverseGeocoding(double longitude, double latitude) async {
    try {
      final res = await http.get(
        // 逆地理编码 API 服务地址
        'https://restapi.amap.com/v3/geocode/regeo',
        // 请求参数
        params: {
          // 高德地图官网开发者控制台申请的密钥
          'key': 'dd9ad19e29f2bf8d5a9018d92902b989',
          // 经度在前，纬度在后，经纬度间以“,”分割
          'location': '$longitude,$latitude',
          // 搜索半径
          'radius': 500,
          // 搜索类型
          'type': '住宅小区',
        },
      );
      // 更新地址信息
      setState(() {
        address = res['regeocode']['formatted_address'];
      });
    } catch (e) {
      print('逆地理编码错误 $e');
    }
  }

  /// 周边小区列表
  List nearbyCommunities = [];

  /// 获取周边小区位置信息
  Future<void> searchPlaceAround(double longitude, double latitude) async {
    try {
      final res = await http.get(
        // 周边搜索API服务地址
        'https://restapi.amap.com/v3/place/around',
        params: {
          'key': 'dd9ad19e29f2bf8d5a9018d92902b989',
          'location': '$longitude,$latitude',
          'keywords': '住宅小区',
          'radius': 500,
        },
      );
      setState(() {
        nearbyCommunities = res['pois'];
        print(res);
      });
    } catch (e) {
      print('获取周边小区信息失败 $e');
    }
  }

  /// 周边小区列表结构
  List<Widget> communityListBuilder(List community) {
    List<Widget> temp = [];
    for (var item in community) {
      temp.add(
        GestureDetector(
          onTap: () {
            Navigator.pushNamed(
              context,
              '/building',
              arguments: {'point': item['name']},
            );
          },
          child: Container(
            color: Colors.white,
            padding: const EdgeInsets.all(10),
            child: Row(
              children: [
                Expanded(child: Text('${item['name']}')),
                Row(
                  children: [
                    Text('${item['distance']}米'),
                    Icon(
                      Icons.arrow_forward_ios,
                      size: 16,
                      color: Colors.black,
                    ),
                  ],
                ),
              ],
            ),
          ),
        ),
      );
    }
    return temp;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('选择社区'),
        backgroundColor: Colors.transparent,
        centerTitle: true,
      ),
      body: ListView(
        padding: const EdgeInsets.all(10),
        children: [
          const Row(
            children: [Text('当前地址', style: TextStyle(color: Colors.grey))],
          ),
          const SizedBox(height: 10),
          Container(
            color: Colors.white,
            padding: const EdgeInsets.all(10),
            child: Row(
              children: [
                Expanded(child: Text(address)),
                GestureDetector(
                  onTap: () {
                    getCurrentLocation();
                  },
                  child: Row(
                    children: [
                      Icon(
                        Icons.location_searching_outlined,
                        color: Colors.blue,
                      ),
                      SizedBox(width: 2),
                      Text('重新定位', style: TextStyle(color: Colors.blue)),
                    ],
                  ),
                ),
              ],
            ),
          ),
          const SizedBox(height: 10),
          const Row(
            children: [Text('附近社区', style: TextStyle(color: Colors.grey))],
          ),
          const SizedBox(height: 10),
          ListView(
            shrinkWrap: true, // 只占用其实际所需空间 默认false会占满父组件
            physics: const NeverScrollableScrollPhysics(), // 禁止滚动
            children: communityListBuilder(nearbyCommunities),
          ),
        ],
      ),
    );
  }
}
